Galilean transformations are \({x}\rightarrow {x}+{v}t\) . The superfluid free energy transforms as [1]}

f f[s, l ,vs] + gsv

under small transformations \({v}\) . Here for the chiral \(p\) -wave \({\Delta } = \Delta _0(\hat{{m}}+i\hat{{n}})\)  and \(\hat{{l}} = \hat{{m}}\times \hat{{n}}\) . The total mass current \({g} = {g}_{s} + {g}_n\)  transforms as \({g} \rightarrow {g}+\rho {v}\) , leading to \({\rho }_n = \rho {1}- {\rho }_s\) . The quasiparticles are governed by \([i\partial _t -\mathcal {H}_{\rm BdG}({k})]\psi \)  with the Bogoliubov-de Gennes Hamiltonian

HBdG(k) = ( (k)  12{k,}
